The organometallic chemistry of lithium, magnesium and zinc is often considered to be very similar. However, the complexes can often show different reactivity and selectivity. (i) Suggest two reasons why you may choose to use an organozinc reagent rather than the analogous lithium reagent in the following reaction. H+ MX Et,0 A В OEt -78°C M = Li M = Zn, X = Br (ii) Give products A and B when M=Li A = B = (iii) Give products A and B when M = Zn (X = Br) A = B =

The organometallic chemistry of lithium, magnesium and zinc is often considered to be very similar. However, the complexes can often show different reactivity and selectivity. (i) Suggest two reasons why you may choose to use an organozinc reagent rather than the analogous lithium reagent in the following reaction. H+ MX Et,0 A В OEt -78°C M = Li M = Zn, X = Br (ii) Give products A and B when M=Li A = B = (iii) Give products A and B when M = Zn (X = Br) A = B =

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter20: The Representative Elements

Section: Chapter Questions

Problem 84AE

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